The GM F40 transmission is stronger than the F35 in the ecotec based Atom. it can take a little more torque since it was mated with the V6 in the Pontiac. Actually the the "40" part of F40 means it is rated up to 400 Nm while the F35 means up to 350 Nm of torque. First gear in the F35 can only take like 100 ft lbs.
Dont know if the extra 50 Nm (37 ft lbs) is worth the hassle.
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